TY - JOUR
T1 - The Impact of Individualizing Sodium Bicarbonate Supplementation Strategies on World-Class Rowing Performance
AU - Boegman, Susan
AU - Stellingwerff, Trent
AU - Shaw, Gregory
AU - Clarke, Nick
AU - Graham, Kenneth
AU - Cross, Rebecca
AU - Siegler, Jason C.
N1 - Funding Information:
The results of the study are presented clearly, honestly, and without fabrication, falsification, or inappropriate data manipulation. We would also like to acknowledge the expert assistance and research support of CSIP's Holly Murray, Wendy Pethick, Heather Noble, Ming-Chang Tsai and Elizabeth Johnson, and Rowing Australia's Samantha Lewis and NSWIS's Amy Woods. Further, we express our deepest gratitude to all the rowers and coaching staff of Rowing Australia, Rowing Canada Aviron and University of Victoria for participating in this study. Funding. A small contribution for the cost of consumables was made by a Canadian sport philanthropic organization B2ten (https://b2ten.com).
Publisher Copyright:
© Copyright © 2020 Boegman, Stellingwerff, Shaw, Clarke, Graham, Cross and Siegler.
PY - 2020/9/9
Y1 - 2020/9/9
N2 - Contemporary meta-analyses have generally demonstrated a positive effect of sodium bicarbonate (NaHCO3) supplementation on exercise performance. However, despite these claims, there is limited data on contrasting individualized and standardized timing of NaHCO3 ingestion prior to exercise to further enhance performance outcomes. Purpose: To determine whether NaHCO3 ingestion timing impacts 2,000-m rowing time-trial (TT) performance in elite-level rowers (Senior National team including Olympic/World Championships level) adhering to their own individualized pre-race strategies (e.g. nutrition, warm-up, etc.). Methods: Twenty three (n = 23) rowers across two research centers (using the exact same methods/protocols) completed three trials: NaHCO3 loading profile at rest to determine the individual's time-to-peak bicarbonate concentration [(Formula presented.)], followed by two randomized 0.3 g·kgBM−1 NaHCO3 supplementation experimental trials conducted at different time points [consensus timing (CON): TT performed 60 min post-NaHCO3 ingestion; and individualized peak (IP): TT performed at the rower's individual peak [(Formula presented.)] determined from the profiling trial post-NaHCO3 ingestion]. Results: There was a significant mean difference of +2.9 [± 0.4 mmol·L−1 (Formula presented.) for IP vs. CON (95% CI 2.0 to 3.8 mmol·L−1); p = 0.02; d = 1.08] at pre warm-up, but not immediately prior to the TT (post warm-up). Performance times were significantly different between IP (367.0 ± 10.5 s) vs. CON (369.0 ± 10.3 s); p = 0.007; d = 0.15). Conclusions: The present study demonstrated a small but significant performance effect of an individualized NaHCO3 ingestion strategy. Similarities after warm-up between pre-TT (Formula presented.) values (CON ~ + 5.5 mmol·L−1; IP ~ + 6 mmol·L−1), however, would suggest this effect was not a result of any meaningful differences in blood alkalinity.
AB - Contemporary meta-analyses have generally demonstrated a positive effect of sodium bicarbonate (NaHCO3) supplementation on exercise performance. However, despite these claims, there is limited data on contrasting individualized and standardized timing of NaHCO3 ingestion prior to exercise to further enhance performance outcomes. Purpose: To determine whether NaHCO3 ingestion timing impacts 2,000-m rowing time-trial (TT) performance in elite-level rowers (Senior National team including Olympic/World Championships level) adhering to their own individualized pre-race strategies (e.g. nutrition, warm-up, etc.). Methods: Twenty three (n = 23) rowers across two research centers (using the exact same methods/protocols) completed three trials: NaHCO3 loading profile at rest to determine the individual's time-to-peak bicarbonate concentration [(Formula presented.)], followed by two randomized 0.3 g·kgBM−1 NaHCO3 supplementation experimental trials conducted at different time points [consensus timing (CON): TT performed 60 min post-NaHCO3 ingestion; and individualized peak (IP): TT performed at the rower's individual peak [(Formula presented.)] determined from the profiling trial post-NaHCO3 ingestion]. Results: There was a significant mean difference of +2.9 [± 0.4 mmol·L−1 (Formula presented.) for IP vs. CON (95% CI 2.0 to 3.8 mmol·L−1); p = 0.02; d = 1.08] at pre warm-up, but not immediately prior to the TT (post warm-up). Performance times were significantly different between IP (367.0 ± 10.5 s) vs. CON (369.0 ± 10.3 s); p = 0.007; d = 0.15). Conclusions: The present study demonstrated a small but significant performance effect of an individualized NaHCO3 ingestion strategy. Similarities after warm-up between pre-TT (Formula presented.) values (CON ~ + 5.5 mmol·L−1; IP ~ + 6 mmol·L−1), however, would suggest this effect was not a result of any meaningful differences in blood alkalinity.
KW - elite athletes
KW - individualized nutrition
KW - performance
KW - sodium bicarbonate ingestion
KW - time trial performance
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U2 - 10.3389/fnut.2020.00138
DO - 10.3389/fnut.2020.00138
M3 - Article
AN - SCOPUS:85091437743
SN - 2296-861X
VL - 7
JO - Frontiers in Nutrition
JF - Frontiers in Nutrition
M1 - 138
ER -